Designed for use with IA543, PK543A, PK543, and PK205 amplifiers only, Alpha Communications® IA502 Multi-Entrance Adapter provides audio intercom and door release switching for 2–8 entrances. Unit is used in addition to system amplifier, and powers off of same transformer. Housed in ABS plastic casing, adapter offers surface-mount installation, operates on safe low-voltage Class II wiring, and includes plug-in wiring harness.
This story is related to the following:Transfer Relays